Positioning and centering mechanism

Abstract

The invention relates to a positioning and centering mechanism. A first clamping block is adopted for being connected to a clamping base through a first cylindrical pin; a first spring is arranged between the first clamping block and the clamping base; a second clamping block is connected to the clamping base through a second cylindrical pin; a second spring is arranged between the second clamping block and the clamping base; ejection rods are arranged in a first clamping block groove and a second clamping block groove, and pass through unthreaded holes in the clamping base and are connected with connecting sleeves; an air cylinder is fixed on an air cylinder placing seat; a piston rod end of the air cylinder is connected with the connecting sleeves; and the air cylinder placing seat is fixed on a measuring mechanism. The positioning and centering mechanism provided by the invention is compact and reasonable in structure, can rapidly position measured parts accurately, effectively reduces the measurement error, and improves repeat accuracy and measurement data accuracy.

Description

technical field [0001] The invention relates to a positioning and centering mechanism, specifically, the feature of a measured part is used as a reference element for positioning, and the precision measurement of associated elements belongs to the technical field of measurement and inspection. Background technique [0002] In the prior art, positioning with a specific feature is usually by simulating the maximum entity boundary shape of the datum feature. The datum feature is used as the positioning element of the measured part, and the size of the datum feature of different measured parts changes within a certain tolerance range. Yes, so there will be a gap when measuring the positioning fit, especially when the tolerance range of the datum feature size is large, the resulting fit gap will be larger, so that the positioning center will deviate from the center of the datum feature of the measured part, resulting in poor repeatability during measurement , the measurement data...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, positioning with a specific feature is usually by simulating the maximum entity boundary shape of the datum feature. The datum feature is used as the positioning element of the measured part, and the size of the datum feature of different measured parts changes within a certain tolerance range. Yes, so there will be a gap when measuring the positioning fit, especially when the tolerance range of the datum feature size is large, the resulting fit gap will be larger, so that the positioning center will deviate from the center of the datum feature of the measured part, resulting in poor repeatability during measurement , the measurement data is inaccurate

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